Big IndyCar Audio Dynamite

Turbocharged IndyCar V6s rattle the walls in testing.

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Sebring's hairpin, also known as Turn 7, is a slow, textbook right-hander that places few demands on its drivers, but it deserves a place among the greats for what it gives to the fans.

With the Chateau Elan hotel acting as an amphitheater-style backdrop, the hairpin is an awesome place to be if you love to absorb the noise coming from turbocharged IndyCar exhausts.

Cars power out of the hairpin firing sound directly at the hotel, and in turn, it reverberates right back at the folks lining the trackside fence.

In the audio clip below, you'll hear 2.2-liter turbocharged Honda and Chevy V6es ripping through the gears on the way to their 12,000 RPM rev limits.

The Chevys, with their twin BorgWarner turbos, are silky smooth, as heard with the first car that passes by. The Hondas, with their larger, single BorgWarner compressors, are sonic malcontents. The second car you'll hear is a Honda, which you can also ID by the hard popping and crackling when off throttle.